{
  "title": "Volume of Cube and Cuboid (Mensuration) - Grade 5 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "What is volume of cube with side=3 cm? 🧊",
      "options": { "A": "9 cm³", "B": "18 cm³", "C": "27 cm³", "D": "36 cm³" },
      "correct_answer": "C"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "Volume of cuboid = length × width × ? 📦",
      "options": {
        "A": "height",
        "B": "depth",
        "C": "thickness",
        "D": "all of these"
      },
      "correct_answer": "A"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "Cuboid: length=4 cm, width=3 cm, height=2 cm. Volume=? 📐",
      "options": { "A": "18 cm³", "B": "20 cm³", "C": "22 cm³", "D": "24 cm³" },
      "correct_answer": "D"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Cube side=5 cm. Volume=? 🔲",
      "options": {
        "A": "100 cm³",
        "B": "115 cm³",
        "C": "120 cm³",
        "D": "125 cm³"
      },
      "correct_answer": "D"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "Which has volume? 🤔",
      "options": { "A": "Square", "B": "Cube", "C": "Line", "D": "Point" },
      "correct_answer": "B"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Volume is measured in _____ units. 📏",
      "options": {
        "A": "square",
        "B": "cubic",
        "C": "linear",
        "D": "circular"
      },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Cuboid: 6 cm × 5 cm × 4 cm. Volume=? 🧮",
      "options": {
        "A": "110 cm³",
        "B": "115 cm³",
        "C": "120 cm³",
        "D": "125 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "A sugar cube side=2 cm. Volume=? 🧊",
      "options": { "A": "4 cm³", "B": "6 cm³", "C": "8 cm³", "D": "10 cm³" },
      "correct_answer": "C"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "If cube volume=64 cm³, side=? 🔍",
      "options": { "A": "3 cm", "B": "4 cm", "C": "5 cm", "D": "6 cm" },
      "correct_answer": "B"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "Volume of cube = side × side × ? ❓",
      "options": { "A": "side", "B": "height", "C": "width", "D": "length" },
      "correct_answer": "A"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "Matchbox: length=8 cm, width=5 cm, height=2 cm. Volume=? 📦",
      "options": { "A": "70 cm³", "B": "75 cm³", "C": "80 cm³", "D": "85 cm³" },
      "correct_answer": "C"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Cube side=7 cm. Volume=? 🧊",
      "options": {
        "A": "333 cm³",
        "B": "343 cm³",
        "C": "353 cm³",
        "D": "363 cm³"
      },
      "correct_answer": "B"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "Volume=48 cm³, length=6 cm, width=4 cm. Height=? 📐",
      "options": { "A": "1 cm", "B": "2 cm", "C": "3 cm", "D": "4 cm" },
      "correct_answer": "B"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Book: 20 cm × 15 cm × 3 cm. Volume? 📚",
      "options": {
        "A": "850 cm³",
        "B": "880 cm³",
        "C": "900 cm³",
        "D": "920 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Which shape has all edges equal? 🔳",
      "options": { "A": "Cuboid", "B": "Cube", "C": "Both", "D": "Neither" },
      "correct_answer": "B"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Volume=72 cm³, length=9 cm, height=2 cm. Width=? 🔢",
      "options": { "A": "3 cm", "B": "4 cm", "C": "5 cm", "D": "6 cm" },
      "correct_answer": "B"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Cube side=10 cm. Volume=? 🧊",
      "options": {
        "A": "100 cm³",
        "B": "500 cm³",
        "C": "1000 cm³",
        "D": "1500 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Aquarium: 60 cm × 30 cm × 40 cm. Volume in liters? (1000 cm³=1 L) 🐠",
      "options": { "A": "70 L", "B": "71 L", "C": "72 L", "D": "73 L" },
      "correct_answer": "C"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "True or False: Cube is special cuboid with all sides equal. ✅❎",
      "options": { "A": "True", "B": "False", "C": "Sometimes", "D": "Never" },
      "correct_answer": "A"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Cuboid: 12 cm × 8 cm × 5 cm. Volume=? 📦",
      "options": {
        "A": "460 cm³",
        "B": "470 cm³",
        "C": "480 cm³",
        "D": "490 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "Cube volume=216 cm³. Find side length. 📏",
      "options": { "A": "5 cm", "B": "6 cm", "C": "7 cm", "D": "8 cm" },
      "correct_answer": "B"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Two cubes: side=4 cm and side=5 cm. Difference in volumes? ⚖️",
      "options": { "A": "59 cm³", "B": "60 cm³", "C": "61 cm³", "D": "62 cm³" },
      "correct_answer": "C"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "Cuboid volume=240 cm³. Length=10 cm, width=6 cm. Height=? 📐",
      "options": { "A": "3 cm", "B": "4 cm", "C": "5 cm", "D": "6 cm" },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Cube and cuboid have same volume 64 cm³. Cube side=4 cm. Cuboid: length=8 cm, width=4 cm. Height=? 🔄",
      "options": { "A": "1 cm", "B": "1.5 cm", "C": "2 cm", "D": "2.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Volume=1.5 m³. Convert to cm³. (1 m³=1,000,000 cm³) 🔄",
      "options": {
        "A": "1,400,000 cm³",
        "B": "1,450,000 cm³",
        "C": "1,500,000 cm³",
        "D": "1,550,000 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Water tank: 2 m × 1.5 m × 1 m. Volume in liters? (1 m³=1000 L) 💧",
      "options": { "A": "2900 L", "B": "2950 L", "C": "3000 L", "D": "3050 L" },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "If cube side doubled, volume becomes _____ times. 🔄",
      "options": { "A": "2", "B": "4", "C": "6", "D": "8" },
      "correct_answer": "D"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Cuboid: volume=180 cm³, length=12 cm, height=3 cm. Width=? 📏",
      "options": { "A": "4 cm", "B": "5 cm", "C": "6 cm", "D": "7 cm" },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Cube volume=343 cm³. Side=? 🧊",
      "options": { "A": "6 cm", "B": "6.5 cm", "C": "7 cm", "D": "7.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Wooden block: 15 cm × 10 cm × 8 cm. Volume=? 🪵",
      "options": {
        "A": "1150 cm³",
        "B": "1175 cm³",
        "C": "1200 cm³",
        "D": "1225 cm³"
      },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Two cuboids: First: 5×4×3 cm. Second: 6×5×2 cm. Which has larger volume? ⚖️",
      "options": {
        "A": "First",
        "B": "Second",
        "C": "Equal",
        "D": "Can't compare"
      },
      "correct_answer": "B"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "Cube side increased by 2 cm from original 7 cm. Volume increase=? 🔢",
      "options": {
        "A": "386 cm³",
        "B": "387 cm³",
        "C": "388 cm³",
        "D": "389 cm³"
      },
      "correct_answer": "A"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Volume=672 cm³, length=14 cm, width=8 cm. Height=? 📐",
      "options": { "A": "5 cm", "B": "5.5 cm", "C": "6 cm", "D": "6.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "If all dimensions of cuboid doubled, volume becomes _____ times. 🔢",
      "options": { "A": "2", "B": "4", "C": "6", "D": "8" },
      "correct_answer": "D"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Cube volume=512 cm³. Side=? 🧊",
      "options": { "A": "7 cm", "B": "7.5 cm", "C": "8 cm", "D": "8.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Shipping box: 60 cm × 40 cm × 30 cm. Volume in m³? 📦",
      "options": {
        "A": "0.068 m³",
        "B": "0.070 m³",
        "C": "0.072 m³",
        "D": "0.074 m³"
      },
      "correct_answer": "C"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Find side of cube with volume=729 cm³. 🧮",
      "options": { "A": "8 cm", "B": "8.5 cm", "C": "9 cm", "D": "9.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "Cuboid volume=360 cm³. Length:width:height = 3:2:1. Find height. 🔄",
      "options": {
        "A": "∛60 cm",
        "B": "∛36 cm",
        "C": "∛72 cm",
        "D": "∛48 cm"
      },
      "correct_answer": "A"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Cube volume=0.125 m³. Side in cm? (1 m=100 cm) 🔳",
      "options": { "A": "48 cm", "B": "50 cm", "C": "52 cm", "D": "54 cm" },
      "correct_answer": "B"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Volume=990 cm³, length=15 cm, height=11 cm. Width=? 📏",
      "options": { "A": "5 cm", "B": "5.5 cm", "C": "6 cm", "D": "6.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "Cube volume=1728 cm³. Find side. Then surface area? (SA=6×side²) 📊",
      "options": {
        "A": "Side=12 cm, SA=864 cm²",
        "B": "Side=11 cm, SA=726 cm²",
        "C": "Side=13 cm, SA=1014 cm²",
        "D": "Side=14 cm, SA=1176 cm²"
      },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Two cubes: side ratio 2:3. Volume ratio? 📈",
      "options": { "A": "2:3", "B": "4:9", "C": "8:27", "D": "16:81" },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Water tank cuboid: 2.5 m × 2 m × 1.8 m. Volume in liters? 💧",
      "options": { "A": "8900 L", "B": "8950 L", "C": "9000 L", "D": "9050 L" },
      "correct_answer": "C"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Cube side increased by 50%. Volume increase %? 📈",
      "options": { "A": "125%", "B": "150%", "C": "200%", "D": "237.5%" },
      "correct_answer": "D"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Cuboid volume=1152 cm³. Length:width=3:2, height=12 cm. Find length. 📐",
      "options": { "A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm" },
      "correct_answer": "C"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Cube A side=6 cm, Cube B volume=1000 cm³. Difference in sides? ⚖️",
      "options": { "A": "2 cm", "B": "3 cm", "C": "4 cm", "D": "5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Swimming pool: 25 m × 10 m × 2 m. Volume in kiloliters? (1 m³=1 kL) 🏊",
      "options": { "A": "490 kL", "B": "495 kL", "C": "500 kL", "D": "505 kL" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "If cuboid length doubled, width halved, height tripled, volume becomes _____ times. 🔄",
      "options": { "A": "1", "B": "2", "C": "3", "D": "4" },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "Cube volume=2197 cm³. Side=? (Hint: 13³=2197) 🧊",
      "options": { "A": "12 cm", "B": "12.5 cm", "C": "13 cm", "D": "13.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Cuboid volume=2016 cm³. Length=21 cm, width=12 cm. Height=? 📏",
      "options": { "A": "7 cm", "B": "7.5 cm", "C": "8 cm", "D": "8.5 cm" },
      "correct_answer": "C"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Two cubes volumes 64 cm³ and 125 cm³. Side difference? ⚖️",
      "options": { "A": "0.5 cm", "B": "1 cm", "C": "1.5 cm", "D": "2 cm" },
      "correct_answer": "B"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "Container: 80 cm × 60 cm × 50 cm. How many 1 liter bottles fit? (1000 cm³=1 L) 🍼",
      "options": { "A": "235", "B": "238", "C": "240", "D": "242" },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "Cube side increased from 8 cm to 10 cm. Volume increase cm³? 📈",
      "options": {
        "A": "486 cm³",
        "B": "488 cm³",
        "C": "490 cm³",
        "D": "492 cm³"
      },
      "correct_answer": "B"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Cuboid dimensions ratio 2:3:5. Volume=750 cm³. Smallest dimension? 📐",
      "options": {
        "A": "2∛25 cm",
        "B": "3∛25 cm",
        "C": "4∛25 cm",
        "D": "5∛25 cm"
      },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "Cube volume=0.343 m³. Side in cm? 🧊",
      "options": { "A": "68 cm", "B": "69 cm", "C": "70 cm", "D": "71 cm" },
      "correct_answer": "C"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "If cuboid length increased 20%, width decreased 10%, height increased 30%, volume change %? 📈",
      "options": {
        "A": "+40.4%",
        "B": "+38.4%",
        "C": "+42%",
        "D": "+45%"
      },
      "correct_answer": "A"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Cube A volume=2744 cm³, Cube B side=15 cm. Volume difference? ⚖️",
      "options": {
        "A": "631 cm³",
        "B": "641 cm³",
        "C": "651 cm³",
        "D": "661 cm³"
      },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "Storage room: 4 m × 3.5 m × 2.8 m. Volume in m³? 🏠",
      "options": {
        "A": "38.2 m³",
        "B": "38.8 m³",
        "C": "39.2 m³",
        "D": "39.8 m³"
      },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Cube and cuboid same volume 216 cm³. Cube side=6 cm. Cuboid: length=9 cm, width=8 cm. Height=? 🔄",
      "options": { "A": "2.5 cm", "B": "3 cm", "C": "3.5 cm", "D": "4 cm" },
      "correct_answer": "B"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "Cube volume=46,656 cm³. Side=? (Hint: 36³=46,656) 🧊",
      "options": { "A": "34 cm", "B": "35 cm", "C": "36 cm", "D": "37 cm" },
      "correct_answer": "C"
    }
  ]
}